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 Yearling
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2d
comment calculate variance of conditional sum of Normals
Thanks - yes - but I like aspects of my alternative method, and I want to keep it for my personal scrapbook for future reference.
2d
revised calculate variance of conditional sum of Normals
fixed typos
2d
answered calculate variance of conditional sum of Normals
2d
revised calculate variance of conditional sum of Normals
Made question standalone, without requiring having to go to another site to understand the context
Apr
12
revised Problem with AxesOrigin option in ListPlot
added 8 characters in body
Apr
12
answered Problem with AxesOrigin option in ListPlot
Apr
10
answered conditional expectation doesn't work with SmoothKernelDistribution
Mar
31
awarded  Yearling
Feb
18
comment Can Mathematica's random number generation be improved?
Yes - but your question is messy. A good question simplifies the problem down to 1 or 2 lines (if possible), and it is certainly possible to do so here. By contrast, your question appears lazy, because it just dumps lines and lines of code from whatever you were doing, without honing it down to the heart of the matter. 2 lines: no more. Further, your title asks if it can be FIXED, which infers that it is broken. But your question is not about quality, nor do you compare the quality of pseudorandom drawings generated, nor does your post suggest anything is broken.
Feb
18
comment Can Mathematica's random number generation be improved?
I don't get the point either. If you want to do a comparison, get it down to 2 lines of code. Do you really need to define num, ints, reals, mus, f, mf, rvs, gf ... just to do a timing test? Talking of efficient, who has time to look through all that?
Feb
10
comment Calculate PDF and CDF of a product of independent exponentially distributed random variables
Hi Wolfgang. TransformProduct is a function from the mathStatica package for Mathematica ... i.e. a stats add-on to mma. According to the compatibility table at mathstatica.com/faq/compatibility.html, Mma 8 is compatible with mathStatica 2.5 ... which was also the first version of mathStatica to include the TransformProduct function. So it should work fine with Mma 8. It would also be interesting to see your solution using standard Mathematica functions, if you have a chance to post it.
Feb
9
comment how to scale the plot of PDF (t-distribution)
\\\\\ . :-) . ////
Feb
8
comment how to scale the plot of PDF (t-distribution)
What is the other?
Feb
8
comment how to scale the plot of PDF (t-distribution)
How can both of these curves be a valid pdf?
Feb
7
revised Calculate PDF and CDF of a product of independent exponentially distributed random variables
added Monte Carlo check
Feb
7
revised Calculate PDF and CDF of a product of independent exponentially distributed random variables
deleted 1 character in body
Feb
7
revised Calculate PDF and CDF of a product of independent exponentially distributed random variables
added 32 characters in body
Feb
7
answered Calculate PDF and CDF of a product of independent exponentially distributed random variables
Jan
25
revised Probability of multivariate normal being positive on each coordinate
removed typo surplus code (not needed)
Jan
24
revised Probability of multivariate normal being positive on each coordinate
added 4 characters in body